Multi-tenancey solutions for a shared zoom room?

[jtall]

I'm looking for how folks have tackled what can't be a unique solution.  I have a client in a shared office.  They have a single conference room with zoom room set up.

Anyone have suggestions for two or three companies sharing a zoom room and seeing a single calendar?  3rd party or native solutions ok, just need to solve this.

Thank you!

Jim